1.) 5a+2=7
2.) 2x+3=7
3.) m/9 +7=3
2007-08-21 08:38:50 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
1.)
5a+2=7
5a + 2 - 2 = 7 - 2
5a = 5
5a / 5 = 5 / 5
a = 1
2.)
2x+3=7
2x + 3 - 3 = 7 - 3
2x = 4
2x / 2 = 4 / 2
x = 2
3.)
m/9 +7=3
m/9 + 7 - 7 = 3 - 7
m/9 = -4
(m/9)*9 = (-4)*9
m = -36
2007-08-21 08:45:08 · answer #1 · answered by Mathematica 7 · 1⤊ 0⤋
1.
5a + 2 = 7
5a = 7 -2
5a = 5
a = 1
2.
2x + 3 = 7
2x = 7-3
2x = 4
x = 2
3
m/9 + 7 = 3
m/9 = 3 -7
m/9 = -4
m = -4 x 9
m = -36
2007-08-21 08:51:50 · answer #2 · answered by lenpol7 7 · 0⤊ 0⤋
1.) 5a+2=7
subtract two from both sides
5a=5
divide each side by 5
a=1
2.) 2x+3=7
subtract 3 from both sides
2x=4
divide each side by 2
x=2
3.) m/9+7=3
subtract 7 from both sides
m/9=(-4)
multiply each side by 9
m=(-36)
2007-08-21 08:48:53 · answer #3 · answered by K C 2 · 0⤊ 0⤋
1.) 5a + 2 = 7
5a = 5
a = 1
2.) 2x + 3 = 7
2x = 4
x = 2
3.) m/9 + 7 = 3
m/9 = (-4)
m = (-36)
2007-08-21 08:47:36 · answer #4 · answered by decaelegant 2 · 0⤊ 0⤋
1.) a=1
2.) x=2
3.)m= -36
2007-08-21 08:57:24 · answer #5 · answered by Claire B 1 · 0⤊ 0⤋